public void PropertyChanged(object sender, string propertyName)
{
BindingPathPart part = nextPart ?? this;
string name = propertyName;
if (!string.IsNullOrEmpty(name))
{
if (part.isIndexer)
{
if (name.Contains("["))
{
if (name != string.Format("{0}[{1}]", part.indexerName, part.path))
{
return;
}
}
else if (name != part.indexerName)
{
return;
}
}
if (name != part.path)
{
return;
}
}
m_Binding.OnSourceChanged(this);
}
//解绑目标
public void Unapply()
{
for (var i = 0; i < m_Parts.Count - 1; i++)
{
BindingPathPart part = m_Parts[i];
part.Unsubscribe();
}
}
//返回对象的属性值
public static object GetSourcePropertyValue(object source, BindingPathPart part, bool needSubscribe)
{
if (instance.m_GetSourceValue == null)
{
instance.m_GetSourceValue = EnterLua.luaenv.Global.GetInPath <BindPathPartGetValue>("BindingExpression.get_property");
}
return(instance.m_GetSourceValue(source, part, needSubscribe));
}
public void Dispose()
{
Unapply();
target = null;
source = null;
m_Context = null;
m_LastPart = null;
m_Parts.Clear();
}
public void Dispose()
{
for (var i = 0; i < m_Parts.Count - 1; i++)
{
BindingPathPart part = m_Parts[i];
part.Dispose();
}
convert = null;
target = null;
source = null;
m_Context = null;
m_LastPart = null;
m_Parts.Clear();
}
internal void OnSourceChanged(BindingPathPart lastPart)
{
bool needSubscribe = mode == BindingMode.OneWay || mode == BindingMode.TwoWay;
BindingPathPart part = lastPart.nextPart;
object m_Current = part.source;
while (part != null)
{
part.SetSource(m_Current); //
m_LastPart = part;
if (!part.isSelf && m_Current != null)
{
if (part.nextPart != null)
{
part.TryGetValue(needSubscribe && part.nextPart != null, out m_Current);
}
}
// UnityEngine.Debug.LogFormat ("OnSourceChanged current={0},property={1},m_Path={2},parts.Count={3},part={4},part.isSelf={5}", m_Current, propertyName, path, m_Parts.Count, part, part.isSelf);
if (!part.isSelf && m_Current == null)
{
break;
}
if (part.nextPart != null && needSubscribe)
{
if (m_Current is INotifyPropertyChanged)
{
// UnityEngine.Debug.LogFormat ("current = {0}", current);
part.Subscribe((INotifyPropertyChanged)m_Current);
}
}
if (part.nextPart != null)
{
part = part.nextPart;
}
else
{
part = null;
}
}
UpdateTarget();
}
//利用lua更新源属性
public static void UpdateSourceValue(object target, string property, object source, BindingPathPart part, string format, object converter)
{
if (instance.m_UpdateSourceValue == null)
{
instance.m_UpdateSourceValue = EnterLua.luaenv.Global.GetInPath <UpdateValue>("BindingExpression.update_source");
}
instance.m_UpdateSourceValue(target, property, source, part, format, converter);
}
void ParsePath()
{
string p = path.Trim();
var last = new BindingPathPart(this, SelfPath);
m_Parts.Add(last);
if (p[0] == ExpressionSplit[0])
{
if (p.Length == 1)
{
return;
}
p = p.Substring(1);
}
string[] pathParts = p.Split(ExpressionSplit);
for (var i = 0; i < pathParts.Length; i++)
{
string part = pathParts[i].Trim();
if (part == string.Empty)
{
throw new FormatException("Path contains an empty part:" + this.propertyName);
}
BindingPathPart indexer = null;
//索引解析
int lbIndex = part.IndexOf('[');
if (lbIndex != -1)
{
int rbIndex = part.LastIndexOf(']');
if (rbIndex == -1)
{
throw new FormatException("Indexer did not contain closing [");
}
int argLength = rbIndex - lbIndex - 1;
if (argLength == 0)
{
throw new FormatException("Indexer did not contain arguments");
}
string argString = part.Substring(lbIndex + 1, argLength);
indexer = new BindingPathPart(this, argString, true);
part = part.Substring(0, lbIndex);
part = part.Trim();
indexer.indexerName = part;
}
//方法解析
lbIndex = part.IndexOf('(');
if (lbIndex != -1)
{
int rbIndex = part.LastIndexOf(')');
if (rbIndex == -1)
{
throw new FormatException("Method did not contain closing (");
}
int argLength = rbIndex - lbIndex - 1;
string argString = part.Substring(0, lbIndex);
var next = new BindingPathPart(this, argString);
// if (argLength >= 1) {
// next.isSetter = true;
// } else {
next.isMethod = true;
// }
last.nextPart = next;
m_Parts.Add(next);
last = next;
}
else if (part.Length > 0)
{
var next = new BindingPathPart(this, part);
last.nextPart = next;
m_Parts.Add(next);
last = next;
}
if (indexer != null)
{
last.nextPart = indexer;
m_Parts.Add(indexer);
last = indexer;
}
}
//解析convert
if (!string.IsNullOrEmpty(converter))
{
convert = ValueConverterRegister.instance.Get(converter);
}
}
public void SetLastPart()
{
m_LastPart = m_Parts[m_Parts.Count - 1];
}
//绑定目标
public void Apply(object context, bool invoke = true)
{
if (!m_IsApplied)
{
ParsePath();
m_IsApplied = true;
}
if (isBound)
{
Unapply();
}
object bindingContext = context;
if (source)
{
bindingContext = source;
}
m_Context = bindingContext;
if (m_Context == null)
{
return;
}
object m_Current = bindingContext;
#if false
ExpressionUtility.ApplyByLua(this, m_Current);
#else
bool needSubscribe = this.needSubscribe;
BindingPathPart part = null;
for (var i = 0; i < m_Parts.Count; i++)
{
part = m_Parts[i];
part.SetSource(m_Current); //
if (!part.isSelf && m_Current != null)
{
if (i < m_Parts.Count - 1)
{
part.TryGetValue(needSubscribe && part.nextPart != null, out m_Current); //lua NofityObject对象通过此方法在BindingExpression.get_property中订阅
}
}
if (!part.isSelf && m_Current == null)
{
break;
}
if (part.nextPart != null && needSubscribe)
{
if (m_Current is INotifyPropertyChanged)
{
part.Subscribe((INotifyPropertyChanged)m_Current);
}
}
}
SetLastPart();
if (invoke)
{
//初始化值
InitValue();
}
#endif
}
//绑定目标
public void Apply(object context, bool invoke = true)
{
if (!m_IsApplied)
{
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.BeginSample(GetProfilerName() + ".ParsePath");
#endif
ParsePath();
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.EndSample();
#endif
m_IsApplied = true;
}
if (isBound)
{
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.BeginSample(GetProfilerName() + ".Unapply");
#endif
Unapply();
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.EndSample();
#endif
}
object bindingContext = context;
if (source)
{
bindingContext = source;
}
m_Context = bindingContext;
if (m_Context == null)
{
Unapply();
return;
}
object m_Current = bindingContext;
#if false
ExpressionUtility.ApplyByLua(this, m_Current);
#else
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.BeginSample(GetProfilerName() + ".Part.TryGetValue");
#endif
bool needSubscribe = this.needSubscribe;
BindingPathPart part = null;
for (var i = 0; i < m_Parts.Count; i++)
{
part = m_Parts[i];
part.SetSource(m_Current); //
if (!part.isSelf && m_Current != null)
{
if (i < m_Parts.Count - 1)
{
part.TryGetValue(needSubscribe && part.nextPart != null, out m_Current); //lua NofityObject对象通过此方法在BindingExpression.get_property中订阅
}
}
if (!part.isSelf && m_Current == null)
{
break;
}
if (part.nextPart != null && needSubscribe)
{
if (m_Current is INotifyPropertyChanged)
{
part.Subscribe((INotifyPropertyChanged)m_Current);
}
}
}
SetLastPart();
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.EndSample();
#endif
if (invoke)
{
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.BeginSample(GetProfilerName() + ".InitValue");
#endif
//初始化值
InitValue();
#if LUA_PROFILER_DEBUG
UnityEngine.Profiling.Profiler.EndSample();
#endif
}
#endif
}
